//Cut, Copy and Paste are the common commands used any application,\n\n<TextBoxCommandManager.PreviewExecuted="textBox_PreviewExecuted"/>\n\n//in above textbox code we can restrict these commands in PrviewExecuted event of CommandManager Class\n//and in code behind add below code and your job is done\n\nprivatevoidtextBox_PreviewExecuted(objectsender,ExecutedRoutedEventArgse)\n{\n\tif(e.Command==ApplicationCommands.Copy||\n \te.Command==ApplicationCommands.Cut||\n \te.Command==ApplicationCommands.Paste)\n\t{\n\t\te.Handled=true;\n\t}\n}\n